Effortless Water Testing The IceCap Magnetic Aquarium Test Kit Mixer is a simple solution for efficiently mixing water test reagents. This gadget saves time and effort by quickly and effortlessly combining test kits. Just place the magnetic stirring bar in the container, press the power button, and let the Smart Stir do the work. With a strong motor and automatic shutoff feature, this mixer makes water testing easier, faster, and more effective. Key Features: Suitable for Most Test KitsTime-Savings120 Minutes Battery LifeRechargeable 5V USB Technical Specifications: Voltage - USB 5VPower - 1WBattery Fully Charged Time - 120 MinutesHeight - 2.375inFootprint - 2.75x2.5inMax Vial Size - 1in Diameter (27mm)Included Vial Size - 10mLOperation Instructions: Place the magnetic stirring bar into the testing vial and insert it into the stir base. Press the power button to turn the mixer on and off. A blue indicator will light up when it is in operation. The mixer will automatically shut off after 5 minutes to conserve battery life. To charge the mixer, you can use the USB charging cable provided. Plug one end into the mixer and the other into a 5V USB port. A red LED will indicate that the mixer is charging, and a green LED will show that the mixer is fully charged.